Everything in the world exists to end up in a book.
Your time is limited, don't waste it living someone else's life.
In a flash, all of the past away from you, the rest of the only memories.
种一棵树最好的时间是20年前，其次是现在。
释义：即使官员清廉如水，也很难避免手下那些圆滑狡猾的属下所带来的麻烦或阻碍。
波函数不是描述单个系统，而是描述系统的集合。